We do not doubt the effort you've made doing exercise. We simply have limits of completed activities with values that a sporty person, without being a profesional athlete, would do. Limits can be determined by kms, calories or duration of the type of activity.
When a synchronized activity exceeds one of the parameters the activity is qualified as suspicious and we only add the data until what we consider suspicious.
However, if you see that your activity values are completely normal, do not hesitate to send us a screenshot of the original activity at email@example.com so we can take a look at your case.